CA2141097A1 - Method and arrangement for manufacturing hot rolled steel strip from continuously cast input stock - Google Patents
Method and arrangement for manufacturing hot rolled steel strip from continuously cast input stockInfo
- Publication number
- CA2141097A1 CA2141097A1 CA002141097A CA2141097A CA2141097A1 CA 2141097 A1 CA2141097 A1 CA 2141097A1 CA 002141097 A CA002141097 A CA 002141097A CA 2141097 A CA2141097 A CA 2141097A CA 2141097 A1 CA2141097 A1 CA 2141097A1
- Authority
- CA
- Canada
- Prior art keywords
- roll stand
- steel strip
- rolling
- strip
- stand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 238000005098 hot rolling Methods 0.000 claims abstract description 4
- 230000006698 induction Effects 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 230000001965 increasing effect Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/60—Continuous furnaces for strip or wire with induction heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
- Y10T29/49991—Combined with rolling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- General Induction Heating (AREA)
Abstract
A method of manufacturing hot rolled steel strip from continuously cast input stock in successive work steps includes adjusting strip-shaped input stock after solidification to hot rolling temperature and introducing the input stock into a multiple-stand rolling mill for rolling into finished strip. The rolled stock is heated by an inductive heating unit at least between the first stand and the second stand.
Description
RAC~OUND OF THE lN Vh~ llON
1. Field of the Invention The present invention relates to a method of manufacturing hot rolled steel strip from continuously cast input stock in successive work steps, wherein, after solidification, strip-shaped input stock is adjusted to hot rolling temperature and the input stock is introduced into a multiple-stand rolling mill for rolling into finished strip.
1. Field of the Invention The present invention relates to a method of manufacturing hot rolled steel strip from continuously cast input stock in successive work steps, wherein, after solidification, strip-shaped input stock is adjusted to hot rolling temperature and the input stock is introduced into a multiple-stand rolling mill for rolling into finished strip.
2. Description of the Related Art In accordance with a newly developed technology for the economical manufacture of hot wide strip, a so-called thin slab having a thickness of, for example, 50mm, is produced in a continuous casting machine particularly constructed for this purpose. After solidification and temperature equalization, the thin slabs are conveyed in a roller conveyor furnace to the rolling train and are rolled to the desired final thickness.
When designing the rolling plant, it is important for economical reasons to use as few roll stands as possible.
Rolling plants have already been realized which make it possible, with strip widths of up to 1350mm for steels having low carbon contents, to achieve a final thickness of 2.5mm by using only 21~10g7 four roll stands. Such a plant is already known from DE 36 37 893 A1. In the known method and the arrangement for carrying out the method, the strip-shaped input stock is adjusted to rolling temperature after solidification and is introduced into a rolling mill for rolling out into finished strip, wherein rolling is carried out continuously in at most three or four roll stands with the pass reductions being as great as possible. In the first two roll stands, approximately maximum rolling moments and large work roll diameters are used.
However, more stands are required when smaller final thicknesses and greater widths of the rolled stock are to be obtained. Consequently, because of the greater length of the plant resulting from the increased temperature drop, an increase of the rolling speed must be accepted. However, because of the increased drive powers required for this purpose, this increase of the rolling speed is frequently not desirable and not even feasible. In addition, usually not more than seven stands are considered for a rolling train.
However, for example, in the case of increased material strengths, it may even be possible that a train with seven stands is not capable of achieving final thicknesses of less than 2mm if the steel strip has a great width. The reason for this limitation of the reduction capacity is essentially the fact that 21~1097 the permissible reduction must be limited in the first stand because of the cast structure present in the first stand. This is a particular disadvantage because in the first stand the rolling temperature still is in the order of magnitude of 1,000C, so that great reductions would be possible because of the low material strength. In the second stand, on the other hand, the material has already essentially recrystallized and the temperature of the rolled stock has dropped by approximately 50C. Consequently, the possible pass reduction in the second stand is limited by the required rolling moment or the required rolling force. Even if the maximum stand capacity is utilized in the second stand and all following stands, the desired final thickness of less than 2mm can frequently not be achieved.
-2~410g~
SUMMARY OF THE lNvh~llON
Therefore, it is the primary object of the present invention to provide a method and an arrangement for the manufacture of hot rolled steel strip from continuously cast input stock which avoid the above-mentioned difficulties and technical limitations and make it possible to roll a thin slab having a thickness of approximately 50mm into a final thickness of less than 2mm without increasing the number of stands or the drive power.
In accordance with the present invention, the above object is met by heating the rolled stock at least between the first stand and the second stand.
The feature provided in accordance with the present invention leads to an advantageous increase of the initial pass temperature in the second stand which leads to an increase of the initial pass temperatures also in all other subsequent stands, so that greater total reduction capacities can be achieved in the second stand and in all other subsequent stands. The feature according to the present invention results in a significant increase of the total reduction capacity of the rolling mill and, thus, makes it possible to achieve the desired final thicknesses of less than 2mm.
2 i ~ 7 In accordance with a preferred feature, the rolled stock is heated by a predetermined temperature value as it passes through an induction heating unit.
In accordance with a further development, the rolled stock is heated between the first and the second stand to the same pass temperature as it has in the first stand.
In accordance with another further development, the rolled stock is heated additionally following the second stand and possibly following additional subsequent stands.
In accordance with another feature of the present invention, heating of the rolled stock between at least two stands is carried out in dependence on the desired final thickness and the given material strength and number of stands in view of the limited rolling speed, torques and/or rolling forces in the case of an insufficient reduction capacity.
Since an inductive heating unit can be switched on and off and the intensity of the heating unit can be adjusted, the method according to the present invention makes possible an extremely sensitive and controllable adjustment of the temperature of the rolled stock to optimum rolling parameters of each individual stand. As a result, the object of achieving a minimum output thickness of the rolled stock is achieved in an uncomplicated 214iO97 manner without increasing the number of stands and without increasing the drive power or the rolling speed.
In accordance with another feature of the invention, a synchronous operation of always two roll stands between which the rolled stock is being heated is controlled in a loop-free manner by means of a minimum pull control.
In a continuous casting plant with a subsequently arranged multiple-stand continuous rolling mill for manufacturing hot rolled steel strip from strip-shaped continuously cast input stock in successive work steps for carrying out the above-described method, wherein the strip-shaped input stock is adjusted to rolling temperature after solidification and is introduced into the rolling mill for rolling into a finished strip, the rolling mill includes an induction heating unit between the first roll stand and the second roll stand.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
214~097 BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
The single figure of the drawing is a schematic side view of the arrangement according to the present invention.
- 21~tO~7 DET~TT-~n DESCRIPTION OF THE PREFERRED EMBODIMENTS
The drawing shows a continuous casting plant 1 for casting strip or strand. The continuous casting plant 1 is followed by a transverse separating unit 2, for example, a flame cutting machine or shears, for separating the cast strip 3 which leaves the continuous casting plant 1 into pieces of equal length. The individual pieces of the strip 3 are then stored in a storage and heating unit 4, for example, a roller conveyor furnace, and are adjusted to a homogenous hot rolling temperature of approximately 1,050 to 1,100C. A piece 5 leaving the furnace 4 is descaled in the known manner and may additionally be adjusted to a new initial strip length, not shown. Subsequently, the piece 5 is finish rolled from the initial cross section to the final rolling thickness of less than 2mm in a rolling train 6 which preferably is composed of seven stands 7a through 7g.
The rolling mill 6 has between the first roll stand 7a and the second roll stand 7b an induction heating unit 8a.
However, the present invention shall not be limited to providing an induction heating unit 8a between the first and second roll stands. Rather, in accordance with another development, it may be provided that at least one additional induction heating unit 8b is arranged following the second stand 7b and possibly following other subsequent stands 7c, etc.
- 21~1097 Moreover, a loop-free minimum pull control 20 may preferably be provided for the roll stand 7b following the induction heating unit 8a.
The measures according to the present invention are not limited to the embodiment illustrated in the drawing. Rather, without departing from the scope of the invention, one or more induction heating units can be controlled in accordance with the drive power or rolling force of the respective roll stand. Also, the measure according to the present invention can be utilized in a rolling mill which has a different number of rolls, and in a rolling mill which has a reversing stand.
The invention is not limited by the embodiments described above which are presented as examples only but can be modified in various ways within the scope of protection defined by the appended patent claims.
When designing the rolling plant, it is important for economical reasons to use as few roll stands as possible.
Rolling plants have already been realized which make it possible, with strip widths of up to 1350mm for steels having low carbon contents, to achieve a final thickness of 2.5mm by using only 21~10g7 four roll stands. Such a plant is already known from DE 36 37 893 A1. In the known method and the arrangement for carrying out the method, the strip-shaped input stock is adjusted to rolling temperature after solidification and is introduced into a rolling mill for rolling out into finished strip, wherein rolling is carried out continuously in at most three or four roll stands with the pass reductions being as great as possible. In the first two roll stands, approximately maximum rolling moments and large work roll diameters are used.
However, more stands are required when smaller final thicknesses and greater widths of the rolled stock are to be obtained. Consequently, because of the greater length of the plant resulting from the increased temperature drop, an increase of the rolling speed must be accepted. However, because of the increased drive powers required for this purpose, this increase of the rolling speed is frequently not desirable and not even feasible. In addition, usually not more than seven stands are considered for a rolling train.
However, for example, in the case of increased material strengths, it may even be possible that a train with seven stands is not capable of achieving final thicknesses of less than 2mm if the steel strip has a great width. The reason for this limitation of the reduction capacity is essentially the fact that 21~1097 the permissible reduction must be limited in the first stand because of the cast structure present in the first stand. This is a particular disadvantage because in the first stand the rolling temperature still is in the order of magnitude of 1,000C, so that great reductions would be possible because of the low material strength. In the second stand, on the other hand, the material has already essentially recrystallized and the temperature of the rolled stock has dropped by approximately 50C. Consequently, the possible pass reduction in the second stand is limited by the required rolling moment or the required rolling force. Even if the maximum stand capacity is utilized in the second stand and all following stands, the desired final thickness of less than 2mm can frequently not be achieved.
-2~410g~
SUMMARY OF THE lNvh~llON
Therefore, it is the primary object of the present invention to provide a method and an arrangement for the manufacture of hot rolled steel strip from continuously cast input stock which avoid the above-mentioned difficulties and technical limitations and make it possible to roll a thin slab having a thickness of approximately 50mm into a final thickness of less than 2mm without increasing the number of stands or the drive power.
In accordance with the present invention, the above object is met by heating the rolled stock at least between the first stand and the second stand.
The feature provided in accordance with the present invention leads to an advantageous increase of the initial pass temperature in the second stand which leads to an increase of the initial pass temperatures also in all other subsequent stands, so that greater total reduction capacities can be achieved in the second stand and in all other subsequent stands. The feature according to the present invention results in a significant increase of the total reduction capacity of the rolling mill and, thus, makes it possible to achieve the desired final thicknesses of less than 2mm.
2 i ~ 7 In accordance with a preferred feature, the rolled stock is heated by a predetermined temperature value as it passes through an induction heating unit.
In accordance with a further development, the rolled stock is heated between the first and the second stand to the same pass temperature as it has in the first stand.
In accordance with another further development, the rolled stock is heated additionally following the second stand and possibly following additional subsequent stands.
In accordance with another feature of the present invention, heating of the rolled stock between at least two stands is carried out in dependence on the desired final thickness and the given material strength and number of stands in view of the limited rolling speed, torques and/or rolling forces in the case of an insufficient reduction capacity.
Since an inductive heating unit can be switched on and off and the intensity of the heating unit can be adjusted, the method according to the present invention makes possible an extremely sensitive and controllable adjustment of the temperature of the rolled stock to optimum rolling parameters of each individual stand. As a result, the object of achieving a minimum output thickness of the rolled stock is achieved in an uncomplicated 214iO97 manner without increasing the number of stands and without increasing the drive power or the rolling speed.
In accordance with another feature of the invention, a synchronous operation of always two roll stands between which the rolled stock is being heated is controlled in a loop-free manner by means of a minimum pull control.
In a continuous casting plant with a subsequently arranged multiple-stand continuous rolling mill for manufacturing hot rolled steel strip from strip-shaped continuously cast input stock in successive work steps for carrying out the above-described method, wherein the strip-shaped input stock is adjusted to rolling temperature after solidification and is introduced into the rolling mill for rolling into a finished strip, the rolling mill includes an induction heating unit between the first roll stand and the second roll stand.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
214~097 BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
The single figure of the drawing is a schematic side view of the arrangement according to the present invention.
- 21~tO~7 DET~TT-~n DESCRIPTION OF THE PREFERRED EMBODIMENTS
The drawing shows a continuous casting plant 1 for casting strip or strand. The continuous casting plant 1 is followed by a transverse separating unit 2, for example, a flame cutting machine or shears, for separating the cast strip 3 which leaves the continuous casting plant 1 into pieces of equal length. The individual pieces of the strip 3 are then stored in a storage and heating unit 4, for example, a roller conveyor furnace, and are adjusted to a homogenous hot rolling temperature of approximately 1,050 to 1,100C. A piece 5 leaving the furnace 4 is descaled in the known manner and may additionally be adjusted to a new initial strip length, not shown. Subsequently, the piece 5 is finish rolled from the initial cross section to the final rolling thickness of less than 2mm in a rolling train 6 which preferably is composed of seven stands 7a through 7g.
The rolling mill 6 has between the first roll stand 7a and the second roll stand 7b an induction heating unit 8a.
However, the present invention shall not be limited to providing an induction heating unit 8a between the first and second roll stands. Rather, in accordance with another development, it may be provided that at least one additional induction heating unit 8b is arranged following the second stand 7b and possibly following other subsequent stands 7c, etc.
- 21~1097 Moreover, a loop-free minimum pull control 20 may preferably be provided for the roll stand 7b following the induction heating unit 8a.
The measures according to the present invention are not limited to the embodiment illustrated in the drawing. Rather, without departing from the scope of the invention, one or more induction heating units can be controlled in accordance with the drive power or rolling force of the respective roll stand. Also, the measure according to the present invention can be utilized in a rolling mill which has a different number of rolls, and in a rolling mill which has a reversing stand.
The invention is not limited by the embodiments described above which are presented as examples only but can be modified in various ways within the scope of protection defined by the appended patent claims.
Claims (12)
1. A method of manufacturing hot rolled steel strip from continuously cast strip-like input stock in successive work steps, the method including adjusting the input stock at the solidification to hot rolling temperature and introducing the input stock into a multiple-stand rolling mill for rolling into finished strip, the rolling mill including at least a first roll stand and a second roll stand, the improvement comprising heating the steel strip at least between the first roll stand and the second roll stand.
2. The method according to claim 1, comprising inductively heating the steel strip by a predetermined temperature value by passing the steel strip through an induction heating unit.
3. The method according to claim 1, wherein the input stock reaches the first roll stand with an initial pass temperature, comprising heating the steel strip between the first roll stand the second roll stand to the initial pass temperature.
4. The method according to claim 1, comprising additionally heating the steel strip following the second roll stand.
5. The method according to claim 4, wherein the rolling mill has additional roll stands downstream of the second roll stand, comprising heating the steel strip following one or more of the additional roll stands.
6. The method according to claim 1, comprising carrying out heating of the steel strip in dependence on a required final thickness of the finished strip and a given material strength and number of stands so as to compensate for an insufficient reduction capacity due to limited rolling speed, torques and/or rolling forces.
7. The method according to claim 4, comprising carrying out heating of the steel strip in dependence on a required final thickness of the finished strip and a given material strength and number of stands so as to compensate for an insufficient reduction capacity due to limited rolling speed, torques and/or rolling forces.
8. The method according to claim 1, comprising carrying out a synchronous operation of the first roll stand and the second roll stand, further comprising controlling the synchronous operation in a loop-free manner by means of a minimum pull control.
9. A continuous casting plant with a subsequently arranged multiple-stand continuous rolling mill for manufacturing hot rolled steel strip from strip-shaped continuously cast input stock in successive work steps, wherein the strip-shaped input stock is adjusted to rolling temperature after solidification and is introduced into the rolling mill for rolling into a finished strip, the rolling mill comprising at least a first roll stand and a second roll stand, further comprising an induction heating unit for heating the steel strip between the first roll stand and the second roll stand.
10. The continuous casting plant according to claim 9, further comprising an additional induction heating unit for heating the steel strip following the second roll stand.
11. The continuous casting plant according to claim 10, further comprising additional roll stands, and a further induction heating unit following at least one of the additional roll stands.
12. The continuous casting plant according to claim 9, wherein the second roll stand comprises a loop-free minimum pull control.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4402402.9 | 1994-01-27 | ||
| DE4402402A DE4402402B4 (en) | 1994-01-27 | 1994-01-27 | Process for producing hot-rolled steel strip from continuously cast starting material and plant for carrying out the process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2141097A1 true CA2141097A1 (en) | 1995-07-28 |
Family
ID=6508829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002141097A Abandoned CA2141097A1 (en) | 1994-01-27 | 1995-01-25 | Method and arrangement for manufacturing hot rolled steel strip from continuously cast input stock |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5611232A (en) |
| EP (1) | EP0666122A1 (en) |
| JP (1) | JP3974949B2 (en) |
| KR (1) | KR100329437B1 (en) |
| CA (1) | CA2141097A1 (en) |
| DE (1) | DE4402402B4 (en) |
| FI (1) | FI950246A (en) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE43252E1 (en) | 1992-10-27 | 2012-03-20 | Vast Power Portfolio, Llc | High efficiency low pollution hybrid Brayton cycle combustor |
| DE19529046A1 (en) * | 1995-07-31 | 1997-02-06 | Mannesmann Ag | Method and device for operating a continuous caster |
| JP3042379B2 (en) * | 1995-08-31 | 2000-05-15 | 日本鋼管株式会社 | HDR continuous rolling method |
| DE19540978A1 (en) * | 1995-11-03 | 1997-05-07 | Schloemann Siemag Ag | Production plant for the continuous or discontinuous rolling out of hot strip |
| NL1001976C2 (en) | 1995-12-22 | 1997-06-24 | Hoogovens Groep Bv | Method and device for continuous casting of steel. |
| US5927118A (en) * | 1996-05-28 | 1999-07-27 | Nkk Corporation | Method for making hot-rolled steel sheet and apparatus therefor |
| NL1003293C2 (en) * | 1996-06-07 | 1997-12-10 | Hoogovens Staal Bv | Method and device for manufacturing a steel strip. |
| US5923699A (en) * | 1996-10-15 | 1999-07-13 | Geneva Steel | Induction furnance heating module and gas zone |
| DE19649295A1 (en) * | 1996-11-28 | 1998-06-04 | Schloemann Siemag Ag | Hot rolling mill |
| SK286108B6 (en) | 1996-12-19 | 2008-03-05 | Corus Staal B.V. | Process and device for producing a steel strip or sheet |
| GB2322320A (en) * | 1997-02-21 | 1998-08-26 | Kvaerner Metals Cont Casting | Continuous casting with rolling stages separated by a temperature controlling stage |
| GB2327375A (en) * | 1997-07-21 | 1999-01-27 | Kvaerner Metals Cont Casting | Continuous metal manufacturing method and apparatus therefore |
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| DE10203711A1 (en) † | 2002-01-31 | 2003-08-14 | Sms Demag Ag | Process and plant for the production of hot strip from austenitic stainless steels |
| US20080236235A1 (en) * | 2004-01-21 | 2008-10-02 | Yoshimichi Hino | Heat-Treatment Apparatus for Steel Plate and Manufacturing Line of Steel Plate Having the Heat-Treatment Apparatus |
| DE102006002505A1 (en) * | 2005-10-31 | 2007-05-03 | Sms Demag Ag | Hot rolling method for e.g. thin slabs comprises heating them and passing them through finishing rollers, heat loss being compensated for by heaters between rollers which are only operated when temperature approaches lower threshold |
| DE102006054932A1 (en) | 2005-12-16 | 2007-09-13 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
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| DE102008020412A1 (en) | 2007-08-24 | 2009-02-26 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
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| DE102009057524A1 (en) * | 2009-12-02 | 2011-06-09 | Sms Siemag Ag | Process for hot rolling a metal strip or sheet and hot rolling mill |
| AT511429B1 (en) * | 2011-06-10 | 2012-12-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR PRE-TREATING A ROLLING BEFORE ROLLING |
| RU2466806C1 (en) * | 2011-06-24 | 2012-11-20 | Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") | Method of sheet hot rolling from aluminium and its alloys |
| CN105121042B (en) * | 2013-03-08 | 2017-12-08 | Sms集团有限公司 | Method for manufacturing metal tape by casting rolling |
| DE102014204073A1 (en) * | 2014-03-06 | 2015-09-10 | Robert Bosch Gmbh | Near-net shape hot rolling of guide rails |
| CN104438357A (en) * | 2014-10-31 | 2015-03-25 | 合肥恒泰钢结构有限公司 | Electric moving type dance roll tension adjusting equipment for cold-rolling strip steel |
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| ITUB20153072A1 (en) * | 2015-08-11 | 2017-02-11 | Pmp Ind S P A | METHOD AND LAMINATION SYSTEM |
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| DE102021207942A1 (en) * | 2021-07-23 | 2023-01-26 | Sms Group Gmbh | Method and device for producing a metallic strip |
| WO2024157294A1 (en) * | 2023-01-27 | 2024-08-02 | Danieli & C. Officine Meccaniche S.P.A. | Plant and method for the production of flat rolled products |
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| US2139483A (en) * | 1935-07-02 | 1938-12-06 | Badlam Stephen | Method of rolling flat material |
| JPS5714413A (en) * | 1980-06-30 | 1982-01-25 | Nippon Steel Corp | Method and device for heating of edge part of hot rolled material |
| JPS629704A (en) * | 1985-07-05 | 1987-01-17 | Nippon Steel Corp | Hot rolling method |
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| US5307864A (en) * | 1988-05-26 | 1994-05-03 | Mannesmann Aktiengesellschaft | Method and system for continuously producing flat steel product by the continuous casting method |
| IT1224318B (en) * | 1988-05-26 | 1990-10-04 | Mannesmann Ag | PROCESS AND PLANT FOR THE CONTINUOUS PRODUCTION OF STEEL BELT |
| DE3839151A1 (en) * | 1988-11-17 | 1990-05-23 | Mannesmann Ag | METHOD FOR PRODUCING HOT-ROLLED STEEL STRIP FROM A STRIP-SHAPED PRE-MATERIAL |
| US5058410A (en) * | 1989-03-14 | 1991-10-22 | Boehler Gesellschaft M.B.H. | Method and apparatus fo producing thin wire, rod, tube, and profiles, from steels and alloys with low deformability, particularly hardenable steels |
| US5082047A (en) * | 1989-07-31 | 1992-01-21 | Bricmanage, Inc. | Method of continuously casting and rolling metallic strip |
| DE4028542A1 (en) * | 1990-09-06 | 1992-03-12 | Mannesmann Ag | Intermediate heating unit for hot rolled metal strip - comprises idler roll set between two rolling stages pushing strip into loop inside induction heater housing |
| US5133205A (en) * | 1990-11-13 | 1992-07-28 | Mannesmann Aktiengesellschaft | System and process for forming thin flat hot rolled steel strip |
| DE4220121C2 (en) * | 1992-06-16 | 1995-06-01 | Elpro Ag | Process for recording the actual tension value for a minimum tension control in a multi-stand continuous rolling mill |
-
1994
- 1994-01-27 DE DE4402402A patent/DE4402402B4/en not_active Expired - Lifetime
-
1995
- 1995-01-05 EP EP95100103A patent/EP0666122A1/en not_active Withdrawn
- 1995-01-09 KR KR1019950000249A patent/KR100329437B1/en not_active IP Right Cessation
- 1995-01-20 FI FI950246A patent/FI950246A/en unknown
- 1995-01-25 CA CA002141097A patent/CA2141097A1/en not_active Abandoned
- 1995-01-26 JP JP01081195A patent/JP3974949B2/en not_active Expired - Fee Related
- 1995-01-27 US US08/380,098 patent/US5611232A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE4402402B4 (en) | 2004-05-13 |
| KR950031261A (en) | 1995-12-18 |
| EP0666122A1 (en) | 1995-08-09 |
| US5611232A (en) | 1997-03-18 |
| KR100329437B1 (en) | 2002-10-25 |
| DE4402402A1 (en) | 1995-08-03 |
| JP3974949B2 (en) | 2007-09-12 |
| FI950246A (en) | 1995-07-28 |
| FI950246A0 (en) | 1995-01-20 |
| JPH07214135A (en) | 1995-08-15 |
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